.index {
  @include flex-col;
  justify-content: center;
  width: 100%;
  height: 100vh;
  background-image: url("../../assets/background.jpg");
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
}
.welcome {
  @include flex-col;
  margin-bottom: 10vh;
  justify-content: center;
  width: 90vw;
  height: 30vh;
  background-color: rgba($color: #000000, $alpha: 0.3);
  color: white;
  font-size: 800%;
  .welcome-zh {
    font-size: 80%;
  }
}
// 三个按钮
.buttons {
  @include flex-row;
  justify-content: space-evenly;
  width: 100vw;
  // 每个按钮
  div {
    @include flex-row;
    cursor: pointer;
    font-size: 300%;
    justify-content: center;
    width: 10vw;
    height: 10vw;
    background-color: $blue;
    color: white;
    border-radius: 50%;
    transition: color, background-color 0.3s;
    box-sizing: border-box;
    &:hover {
      box-sizing: border-box;
      color: $blue;
      background-color: white;
      transition: color, background-color 0.3s;
    }
  }
}
